48V 6Ah emergency fire water pump power battery solution

　　48V/6Ah fire-fighting water pump power battery adopts ternary lithium-ion battery as the positive electrode material, which has good safety. The main function of the fire pump is to provide power and energy. The fire pump battery is equipped with high rate discharge, large discharge current, many cycles of charge and discharge, low self-discharge rate, long service life, strong deep discharge capability, high charging efficiency, low maintenance or no maintenance Advantages of maintenance, etc.

　　The traditional emergency fire water pump power source is lead-acid battery or diesel engine, which acts as the power source of emergency fire fighting. Due to the low energy density, heavy mass, low rate discharge efficiency, non-environmental protection and other shortcomings of lead-acid battery itself, and the diesel engine is noisy and is not environmentally friendly, It has been unable to meet the needs of modern portable emergency power sources. Because of its unique advantages such as high energy ratio, light weight, small size, high cycle life, high safety, and high rate, lithium battery packs have become the first choice to replace lead-acid and diesel engines in many emergency power supply fields. The 48V/6Ah fire-fighting water pump power battery adopts ternary lithium-ion battery as the positive electrode material, which has good safety. The main function of the fire pump is to provide power and energy. The fire pump battery is equipped with high rate discharge, large discharge current, many cycles of charge and discharge, low self-discharge rate, long service life, strong deep discharge capability, high charging efficiency, low maintenance or no maintenance Advantages of maintenance, etc. The electrostatic immunity level is IV. 1) Lithium battery pack model design requirements: 18650-13S3P/6Ah/48V. 2) Circuit design requirements: 1. Single cell overcharge protection voltage: 4.3±0.25V 2. Single cell overcharge recovery voltage: 4.15±0.50V 3. Single cell overdischarge protection voltage: 2.80±0.08V 4. Single cell Over-discharge recovery voltage: 3.00±0.10V 5. Combined battery over-current protection value: 120A 6. Continuous discharge current: less than or equal to 60A 7. Battery over-temperature protection value (recoverable): 70±5 degrees 9. Finished battery is also available Short circuit and reverse charge protection. 3) Design requirements for battery cycle life: 500~1000 times (national standard charge and discharge standards) 4) Design requirements for battery dimensions: 310*210*120mm PVC packaging 2. Emergency fire pump power battery design scheme: 1) Protection plate (PCM ): It is mainly designed to protect the rechargeable lithium battery pack. Due to the chemical characteristics of the lithium battery itself, it is necessary to provide protection functions such as overcharge, overdischarge, short circuit, overcurrent, and temperature to avoid burning, explosion and other hazards. . 2) Protection IC (Protection IC): The main protection function chip of the design scheme, which performs online monitoring of overcharge, overdischarge, overcurrent, short circuit and other functions of the cell. Make the batteries work in a safe, stable and efficient range. 3) Temperature switch: Mainly designed for temperature protection function. When the temperature of the battery itself reaches 75 degrees due to other abnormal problems, the temperature switch will act to achieve over-temperature protection. When the temperature drops, it will automatically recover. 5) 18650 lithium ion batteries/18650/2000mAh/3.7V 10C (Sanyo long-life high-rate batteries). 6) Field effect tube (MOSFET): MOSFET, which acts as a switch in the protection circuit, will always keep the voltage at both ends of the load from increasing or decreasing, ensuring voltage stability. 7) Schematic diagram of power meter:

　　Third, the main features: 1. The battery pack is safe, high temperature resistant, and long cycle life. 2. The battery pack has a high cycle life and conforms to the value concept of low carbon, energy saving and environmental protection. 3. The battery has a built-in BMS system with multiple protection functions. The protection system (PCM/BMS) all adopts the most advanced chips and MOS from Japan and the United States. With balance. 4. The battery core materials are LiMn2O4 (lithium manganate), Li-Ni-Co-Mn-O (ternary material), and LiFePO4 (lithium iron) for selection. 5. Imported Sanyo, Sony, Panasonic, Samsung, LG original batteries and domestic famous brand batteries can be used as the combined unit to ensure the consistency, stability and safety of the battery pack. 6. Multi-parallel and multi-string combination and battery modular design can be carried out.